mistress
nounUK /ˈmɪs.trəs/
US /ˈmɪs.trəs/
A woman who is in charge of something, like a house or a pet.
The mistress of the house welcomed all the guests.
OTHER MEANINGS
2. A woman a man is romantically involved with, when he is already married to someone else.
The story was about a king and his secret mistress.
3. A female teacher, especially in an old-fashioned school.
The music mistress taught the children to sing.
4. A woman who is very skilled at something.
She is a mistress of the art of cooking.
5. An old word for a woman who owns or controls an animal, such as a dog.
The dog ran back to its mistress when she called.